:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #eef2ff;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #1f2933;
  --text-soft: #6b7280;
  --border: #e5e7eb;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --shadow: 0 10px 30px rgba(17, 24, 39, .08);
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- 导航 ---------- */
.nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .03);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.nav-links a { color: var(--text-soft); font-size: 14px; }
.nav-links a:hover { color: var(--primary); text-decoration: none; }
.nav-user {
  font-size: 14px;
  color: var(--text);
  background: var(--primary-light);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ---------- 布局 ---------- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}
.page-title { font-size: 22px; font-weight: 700; margin: 6px 0 18px; }
.muted { color: var(--text-soft); }

/* ---------- 卡片 ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.grid { display: grid; gap: 18px; }

/* ---------- 表单 ---------- */
.form-group { margin-bottom: 16px; }
label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.req::after { content: " *"; color: var(--danger); }
input, select, textarea {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .15);
}
textarea { resize: vertical; min-height: 110px; }
.field-error { color: var(--danger); font-size: 13px; margin-top: 4px; min-height: 16px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .05s, background .15s, opacity .15s;
  text-decoration: none;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { background: #f3f4f6; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: .9; text-decoration: none; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .6; cursor: not-allowed; }

/* ---------- 认证页 ---------- */
.auth-wrap {
  max-width: 420px;
  margin: 40px auto;
}
.auth-wrap .card { padding: 30px; }
.auth-head { text-align: center; margin-bottom: 20px; }
.auth-head h1 { font-size: 22px; margin: 0 0 6px; }
.auth-foot { text-align: center; margin-top: 16px; font-size: 14px; color: var(--text-soft); }

/* ---------- 提示 Toast ---------- */
#toast-box {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: max-content;
  max-width: 92vw;
}
.toast {
  padding: 11px 18px;
  border-radius: 10px;
  color: #fff;
  font-size: 14px;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity .25s, transform .25s;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--primary); }

/* ---------- 徽章 ---------- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-processing { background: #dbeafe; color: #1e40af; }
.badge-resolved { background: #dcfce7; color: #166534; }
.badge-admin { background: var(--primary-light); color: var(--primary-dark); }
.badge-yes { background: #dcfce7; color: #166534; }
.badge-no { background: #fee2e2; color: #991b1b; }
.badge-img { background: #ede9fe; color: #5b21b6; }
.badge-video { background: #cffafe; color: #155e75; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; background: var(--surface); font-size: 14px; }
th, td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: #f9fafb; font-weight: 600; color: var(--text-soft); white-space: nowrap; }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #f9fafb; }
.row-click { cursor: pointer; }

/* ---------- 进度条 ---------- */
.progress {
  height: 8px;
  background: #e5e7eb;
  border-radius: 999px;
  overflow: hidden;
  margin-top: 10px;
  display: none;
}
.progress.show { display: block; }
.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--primary);
  transition: width .2s;
}

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.tab {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-soft);
}
.tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- Modal ---------- */
.modal-mask {
  position: fixed; inset: 0;
  background: rgba(17, 24, 39, .5);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 200;
}
.modal-mask.show { display: flex; }
.modal {
  background: #fff;
  border-radius: var(--radius);
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow: auto;
  padding: 24px;
  box-shadow: var(--shadow);
}
.modal h3 { margin-top: 0; }
.modal-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.media-preview { margin: 14px 0; text-align: center; }
.media-preview img, .media-preview video {
  max-width: 100%;
  max-height: 360px;
  border-radius: 10px;
  border: 1px solid var(--border);
}
.close-x {
  float: right;
  cursor: pointer;
  font-size: 22px;
  color: var(--text-soft);
  border: none;
  background: none;
}

/* ---------- 反馈卡片 ---------- */
.fb-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: box-shadow .15s, transform .05s;
}
.fb-card:hover { box-shadow: 0 14px 34px rgba(17,24,39,.12); }
.fb-title { font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.fb-meta { font-size: 13px; color: var(--text-soft); display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #fff;
  border-radius: var(--radius);
  padding: 48px 32px;
  text-align: center;
  box-shadow: var(--shadow);
}
.hero h1 { font-size: 30px; margin: 0 0 12px; }
.hero p { font-size: 16px; opacity: .92; margin: 0 0 22px; }
.hero .btn-primary { background: #fff; color: var(--primary); }
.hero .btn-ghost { border-color: rgba(255,255,255,.6); color: #fff; }

.empty { text-align: center; color: var(--text-soft); padding: 40px 0; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .nav-inner { padding: 10px 14px; }
  .container { padding: 18px 14px 50px; }
  .hero { padding: 36px 18px; }
  .hero h1 { font-size: 24px; }
  th, td { padding: 10px; }
}